body {
    font-family: "Helvetica Neue", /*小米写法*/ Helvetica, Arial, "PingFang SC",
    "Hiragino Sans GB", "Heiti SC",
    "Microsoft YaHei",
    "WenQuanYi Micro Hei",
    sans-serif;
    background: green;
}
.active{
    background: navajowhite;
}
.active{
    background: navajowhite;
}
div p{
    color: green;
}
p{
    color: #1b6d85;
    font-size: 30px;
}
span{
    font-size: 20px;
    color: #5bc0de;
}
button{
    width: 260px;
    height: 80px;
    background: #8a6d3b;
    color: white;
    text-align: center;
    line-height: 30px;
}
